Energy Storage Sizing Strategy for Grid-Tied PV Plants under Power Clipping Limitations

Nicolás Müller, Samir Kouro, Pericle Zanchetta, Patrick Wheeler, Gustavo Bittner and Francesco Girardi
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Nicolás Müller: Department of Electrical and Electronic Engineering, University of Nottingham, Nottingham NG7 2RD, UK
Samir Kouro: Electronics Engineering Department, Universidad Técnica Federico Santa María, Valparaiso 2390123, Chile
Pericle Zanchetta: Department of Electrical and Electronic Engineering, University of Nottingham, Nottingham NG7 2RD, UK
Patrick Wheeler: Department of Electrical and Electronic Engineering, University of Nottingham, Nottingham NG7 2RD, UK
Gustavo Bittner: Electronics Engineering Department, Universidad Técnica Federico Santa María, Valparaiso 2390123, Chile
Francesco Girardi: Bluefield Services, Bristol BS1 6DZ, UK

Energies, 2019, vol. 12, issue 9, 1-17

Abstract: This paper presents an analyses of an Energy Storage System (ESS) for grid-tied photovoltaic (PV) systems, in order to harness the energy usually lost due to PV array oversizing. A real case of annual PV power generation analysis is presented to illustrate the existing problem and future solutions. Three PV modeling techniques have been applied to estimate non-measured non-harnessed PV power to provide an ESS energy and power sizing strategy. Moreover, a control strategy to store or release power from the DC-link, without modifying the Maximum Power Point Tracking (MPPT) strategy, is presented. The results show an estimation of the annual power loss caused by oversizing the PV array. The ESS sizing strategy gives insight into not only the energy requirements, but also the power requirements of the system. Simulation results show that the proposed ESS control strategy is capable of harnessing the extra power without modifying the existing power converter of the PV plant nor its control strategy.

Keywords: power clipping; ESS sizing; grid-tied PV plant (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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